21041420223 has 8 divisors (see below), whose sum is σ = 28059963568. Its totient is φ = 14025245184.

The previous prime is 21041420167. The next prime is 21041420243. The reversal of 21041420223 is 32202414012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21041420223 - 2⁸ = 21041419967 is a prime.

It is a super-3 number, since 3×21041420223³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21041420223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041420243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571240 + ... + 606957.

It is an arithmetic number, because the mean of its divisors is an integer number (3507495446).

Almost surely, 2^21041420223 is an apocalyptic number.

21041420223 is a deficient number, since it is larger than the sum of its proper divisors (7018543345).

21041420223 is a wasteful number, since it uses less digits than its factorization.

21041420223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184153.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21041420223 its reverse (32202414012), we get a palindrome (53243834235).

The spelling of 21041420223 in words is "twenty-one billion, forty-one million, four hundred twenty thousand, two hundred twenty-three".